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            function addEvent(obj,type,fn){
                if(obj.attachEvent){
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addEvent(window,'scroll',function(){
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        var userAgent=navigator.userAgent.toLowerCase(), s, o = {};   
var browser={
version:(userAgent.match(/(?:firefox|opera|safari|chrome|msie)[\/: ]([\d.]+)/))[1],
        safari:/version.+safari/.test(userAgent),
        chrome:/chrome/.test(userAgent),
        firefox:/firefox/.test(userAgent),
        ie:/msie/.test(userAgent),
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} /* 获得浏览器的名称及版本信息 */

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            $#body { padding-top: 70px; }
            th{
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            td{
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            .table-striped tbody tr:nth-child(even) td {
                background-color: #D7EBFF;
            }
            .fix_div1{
                z-index:2;
            }
            .fix_div2{
                z-index:1;
            }
            $#td.ac{
            $#    background-color:#e1ffb5;
            $#}
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